ONT

Ontario California Airport (ONT) departures today

live · 1h ago

Ontario California Airport (ONT) delays today: 77% of the 48 flights we have timed operated within 15 minutes of schedule. Departures are running +5 min, across 56 flights tracked so far today. The busiest departure hour on today's board is 10:00 local, with 11 flights scheduled to leave. The most-served destination today is Denver (DEN), with 7 departures on the board. Source: official airport boards, METAR weather, Pro Flight Search tracking. Updated 6 September 2026 at 17:18 UTC.

DEPARTURES WATCH
+5 min

typical departure delay right now

The terminal forecast includes fog/mist. Measured operations: departures +5 min, arrivals 8 min early. This airport's board does not publish cancellations.

Live arrivals · Delays & weather · Direct routes · Global delays now

Cancellation risk · Do planes make up time? · Weather delay risk

JUST DEPARTEDAA 2661 to PHX · +5 min

Live departures board

est. departure
10:45 WN 2609to BUR on time
Scheduled10:45Estimated10:45
Running to plan on the current board.
10:45 WN 418to DAL on time
Scheduled10:45Estimated10:45Terminal4
Running to plan on the current board.
10:47 AS 730to PDX on time
Scheduled10:47Estimated10:47Terminal2
Running to plan on the current board.
10:49 F9 2908to DEN on time
Scheduled10:49Estimated10:49Terminal4
Running to plan on the current board.
10:50 WN 1428to DEN on time
Scheduled10:50Estimated10:50Terminal4
Running to plan on the current board.
11:15 F9 2232to LAS on time
Scheduled11:15Estimated11:15
Running to plan on the current board.
11:15 WN 3697to LAS on time
Scheduled11:15Estimated11:15Terminal4
Running to plan on the current board.
11:18NOW
11:20 WN 2615to OAK on time
Scheduled11:20Estimated11:20Terminal4
Running to plan on the current board.
11:55 DL 4070to SEA on time
Scheduled11:55Estimated11:55Terminal2
Running to plan on the current board.
12:00 AS 654to SEA on time
Scheduled12:00Estimated12:00Terminal2
Running to plan on the current board.
12:00 DL 665to ATL on time
Scheduled12:00Estimated12:00Terminal2
Running to plan on the current board.
12:05 WN 894to PHX on time
Scheduled12:05Estimated12:05Terminal4
Running to plan on the current board.
12:15 WN 3097to SMF on time
Scheduled12:15Estimated12:15Terminal4
Running to plan on the current board.
12:33 AA 2956to DFW on time
Scheduled12:33Estimated12:33Terminal4
Running to plan on the current board.
12:35 WN 1080to HOU on time
Scheduled12:35Estimated12:35Terminal4
Running to plan on the current board.
13:06 DL 3172to SLC on time
Scheduled13:06Estimated13:06Terminal2
Running to plan on the current board.
13:17 AA 6455to PHX on time
Scheduled13:17Estimated13:17Terminal4
Running to plan on the current board.
13:18 UA 1263to DEN on time
Scheduled13:18Estimated13:18Terminal2
Running to plan on the current board.
13:30 8C 3371to OGG on time
Scheduled13:30Estimated13:30
Running to plan on the current board.

Board fetched 1h ago · how we report

0departed
last hour
6departing
next hour
0delayed
15+ min
0cancelled
on board

Runway demand · next 3 h

11:1812:4814:13

Scheduled departures per 15 minutes. The tallest banks are where queues form.

Trouble downstream

next 2½ h destinations
SEASEA2 outboundno dataPHXPHX2 outboundon timeOAKOAK1 outboundno dataATLATL1 outboundno data

Delay at the destination often ripples back into departure holds here.

Where Ontario California Airport (ONT) departures fly

DENDenver7 flights
DFWDallas-Fort Worth5 flights
SEASeattle4 flights
SFOSan Francisco4 flights
PHXPhoenix4 flights
LASLas Vegas3 flights
SLCSalt Lake City2 flights
IAHHouston2 flights

Destinations on the current board, busiest first. 24 airports are served in this departures window.

Busiest departure hours at Ontario California Airport (ONT)

00:0012:0023:00

The busiest departure hour on today's board is 10:00 local, with 11 flights scheduled to leave.

When this board says…

posted +15
+25
posted +30
+42
posted +45
+55
posted +60
+80
board's first estimatemedian actual

Every board update is stored, including the revisions. The first delay this board admits understates the median outcome. Posted vs. actual across every hub: the slippage study →

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: Ontario California Airport (ONT) live delay and board tracking, measured from official airport boards.

Canonical URL
https://proflightsearch.com/airport-departures/ontario-ONT
How we measure this →

Ontario California Airport (ONT) departures: common questions

How delayed are Ontario California Airport (ONT) departures right now?

Ontario California Airport (ONT) delays today: 77% of the 48 flights we have timed operated within 15 minutes of schedule. Departures are running +5 min, across 56 flights tracked so far today.

How many flights are cancelled at Ontario California Airport (ONT) today?

No cancellations are showing across the 56 flights currently on the board.

What is the busiest departure hour at Ontario California Airport (ONT)?

The busiest departure hour on today's board is 10:00 local, with 11 flights scheduled to leave.

Where do Ontario California Airport (ONT) departures fly?

The busiest destinations on the current board are Denver (DEN), Dallas-Fort Worth (DFW), Seattle (SEA), San Francisco (SFO), Phoenix (PHX). In total 24 airports are served in this window.